Alga, by W. H. Harvey.| FLORA OF TASMANIA. 287 
Gen. XIV. NOTHEIA, Bail. et Harv. 
(Bail. et Harv. in Wilkes's Amer. Expl. Ex. ; Harv. in Hook. Fl. N. Zeal. ii. p. 215.) 
1. Notheia anomala (Bail. et Harv. l.c. ; Harv. in Hook. Fl. N. Zeal. ii. p. 216. t. 109 4). 
Has. Parasitic on Hormosira Banksii, very common. 
DIsTRIB. South and east coasts of New Holland. New Zealand. 
Tribe II. SPOROCHNACEZ. 
Gen. XV. SPOROCHNUS, 4g. 
(Kütz. Phyc. p. 342; J. Ag. Sp. Alg. i. p. 173.—Sporochni sp., Auct.) 
1. Sporochnus comosus (Ag. Syst. p. 259; J. Ag. Sp. Alg. i. p. 174; Kütz. Sp. p. 569). 
Has. Georgetown, R. Gunn, W. H. H., etc. 
DrsrarB. Coasts of New Holland. 
To this place we refer a species common at Georgetown, but which varies much in the relative lengths 
of the pedicel and receptacle. In the normal state, described by Agardh, the pedicel is four times shorter than 
the receptacle, and so we find it in some specimens. In others, and even on different branches of the same 
frond, we find pedicels half as long, as long as, or longer than their receptacle. Either, therefore, we must 
refer all to one head, or establish four or five new names on the specimens before us. This latter could be 
easily done had we but a few examples to decide from; but after examining some hundreds collected at King 
George's Sound and Georgetown, we are forced to unite all under one head. When this plant grows in shallow 
water, it is frequently bushy, the branches much divided ; but when, as at Georgetown, it inhabits the deeper parts 
of the Tamar, in a rapid tideway, the primary branches are nearly simple, and lengthened to two feet or more. 
Some of our specimens answer to the description given of Sp. Gertneri, a species of which we have seen no 
specimen. 
2. Sporochnus Herculeus (J. Ag.) ; “ fronde cylindracea ramis simpliciuseulis virgata, recepta- 
culis longissimis cylindraceis subclavatisgue in pedicellum ipsis breviorem longe attenuatis.” J. Ag. Sp. 
Alg. i. p. 119. 
Haz. Georgetown, Gunn, fide J. Agardh. 
This species, which is very imperfectly known to us, is founded by Professor J. Agardh on a specimen which 
we formerly inadvertently sent him for S. radiciformis, but nothing similar to which have we been able to find 
either in Mr. Gunn’s extensive collection or in our own. Professor Agardh has obligingly returned a fragment 
to Dr. Harvey. This agrees with the diagnosis given, and certainly differs from any of the innumerable speci- 
mens of S. comosus which have come before us. The species must remain, therefore, for future elucidation. 
3. Sporochnus radiciformis (R. Br.; J. Ag. Sp. Alg. i. p. 175; Harv. in Lond. Journ. vi. 
p. 415; Kiitz. Sp. Alg. p- 568). ; 
Has. Georgetown, Gunn, W. H. H., ete. 
Disrris. South and west coasts of New Holland. 
4. Sporochnus apodus (Harv.) ; fronde setacea longissima decomposite ramosa, ramis filiformibus 
simpliciusculis receptaculis cylindraceis apice subacutis sessilibus horizontaliter patentibus. 
Has. Georgetown, W. H. H. 
Of this remgrkable plant we have, 
as yet, seen but a solitary specimen, but this is so strongly characterized 
that we must, for the present, hold it to be a species. It consists of part of a stem, 
8-10 inches long, closely set 
